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  <script>
    var arr = [1, 2, 3, 4, 5, 6, 7, 8]

    /* 过滤出奇数 */
    var odds = arr.filter((value) => {
      return value % 2 === 1
    })
    console.log(odds);

    /* 得到映射后的新数组 取原值的完全平方数 */
    var perfects = arr.map(value=>value*value)
    console.log(perfects);

  </script>
</body>

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